NDee is a fabulous host. His place is spacious and clean, with taxis and tuk-tuks right outside if you don't fancy the 10 min walk to the BTS. Several 7elevens around, a bigger, well stocked supermarket (Villa Market) before you get to the BTS. Thai street food and international restaurants all around you. Bumrungrad hospital 7 mins on foot.
The wifi worked well as did the air con, although the one in the lounge is a bit on the noisy side. The bed is huge! Although firmer than what we're used to, we slept really well.
The only downside for us was the lack of cooking equipment. Only 2 small saucepans, one of which had a broken handle. A bigger sauce pan, and things like a wok and a toaster would be welcome additions.
Also, the window in the bedroom doesn't shut well, so although the place is generally very quiet, if you're a light sleeper like me you will hear the rooster (and the occasional koel) outside waking you up in the early hours of the morning (but then, this is quite common in Bangkok) - bring earplugs! ;-)
All in all we very much enjoyed staying here and would definitely be happy to return and recommend it to others visiting Bangkok.